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Property connection elements are used to load sewer models based on data at the level of individual properties. This is useful when you have loading data provided for all customers/properties based on metering, number of occupants/fixture units, or simply flow per property, and you would like to see it in your hydraulic model (rather than lumping all loads into manholes).
A Property Connection can be placed manually in a model by selecting Layout, then either Property Connection or Lateral.
Property connections can be connected to a downstream gravity network using lateral links. Laterals connect to tap elements and most gravity nodes such as manholes, transitions, and catch basins. Taps can connect to channels and manholes.
Property connections cannot be connected to pressure elements. Laterals can only make a single connection to a tap or other hydraulic element. There cannot be any hydraulic elements on the upstream side of a Property Connection. However, a Property Connection can be the Outflow Element for a catchment.
Option 1: A Property Connection can be placed manually in a model by selecting Layout, then either Property Connection or Lateral. The load data for each Property Connection can then be entered in the properties grid or FlexTable.
Option 2: Create Property Connection elements via ModelBuilder, with the loading data attached to the data source. Then use LoadBuilder to assign the property connection flows to the nearest element.
LoadBuilder can be used to assign isolated Property Connection elements to the nearest element by creating a tap and lateral connection. Isolated Property Connections are those elements that are not connected to any lateral element. Laterals are automatically placed between the source element and the hydraulic network when using LoadBuilder and selecting Property Connection Load Data as the Available LoadBuilder Method. When this data source is used, it is assumed that that load data is already available in the Property Connection.
For steps detailing this process, see the following article:Using LoadBuilder to assign Property Connections to the nearest element while creating taps and/or laterals
Elevation of the ground and the lateral invert can be placed in the attributes of the Property Connection element but are not used in the hydraulic calculations. It is not possible to construct a profile through a lateral link and up to a Property Connection.
Property connections are used for sanitary loading in the Implicit, Explicit and GVF Convex solvers, but not the GVF Rational solver. Property connections support hydrograph, pattern, and unit loads. They can also directly accept runoff as the outlet of a catchment. For the GVF Rational Solver, flow through a Property Connection must come from a Catchment. (Property Connection designated as the Outflow Element.)
The query "Property Connections not connected to Nearest Link" is included in the Network Review Predefined Queries (version 10.00.00.40 and later).
Using LoadBuilder to assign Property Connections to the nearest element and create taps and laterals
Introducing individual Property Connections to your model [VID]
Help Article "Property Connections"